Hawes, A. (2011). What the Romans did for the world. Crabtree Pub. Co..
Cita Chicago Style (17a ed.)Hawes, Alison. What the Romans Did for the World. St. Catharines, Ont. ; New York: Crabtree Pub. Co., 2011.
Cita MLA (8a ed.)Hawes, Alison. What the Romans Did for the World. Crabtree Pub. Co., 2011.
Precaución: Estas citas no son 100% exactas.